just because....... The term "silent film" is something of a misnomer, as these films were almost always accompanied by live sounds. During the silent era that existed from the mid-1890s to the late 1920s, a pianist, theater organist—or even, in large cities, a small orchestra—would often play music to accompany the films. Pianists and organists would play either from sheet music, or improvisation. Sometimes a person would even narrate the intertitle cards for the audience. Though at the time the technology to synchronize sound with the video did not exist, music was seen as an essential part of the viewing experience. The term is also frequently used to describe sound-era films that have a recorded music-only soundtrack without dialogue, such as City Lights and The Artist.

Above copied from wiki so may only be as good as the velvet paper it's printed on